Concrete finishing device



July 27, 1948.

w. J. SPONSELLER 2,446,028

CONCRETE FINISHING DEVICE Filed May 3, 1945 3mm walliamellya'omellez;

AWMJKMWJBIQQAE I k Patented July 27, 1948 UNITED. STATES PATENT OFFICE William J. Sponseller, Salem, Ohio Application May a, 1945, SerialNo. 591,678 I J i 4 Claims. (or 94-45) v y This invention relates to a device for finishing concrete surfaces and more particularlyto an improved vibratory device for that purpose.

One of the objects of the present invention is to provide a hand manipulated concrete finishing device equipped with an electrical pulsating mag- 1 A further object of the present invention is to provide a device of the character described in which the electric pulsating magnet vibrator and handle for manipulating the device are independently mounted to prevent excessive vibrations from being transmitted to the operator.

With these and other objects inview, ,which will be apparentfrom the subsequent description, the present invention embraces the concept of providing a compact, easily operated concrete finishing device provided with an electric pulsating magnet vibrator. Thedevice may be readily and economically constructed and the vibrator and handle for manipulating the device are independently mounted to prevent excessive vibrations from being transmitted through the handle to the operator. a

A hand operated vibratory device of this type is highly desirable for use in smoothing and finishing the surface of fiat concrete slabs such as are employed in makin sidewalks, roads, floors, decks and the like. In operation the vibrations are transmitted to the surface of the unfinished concrete. While the operator is passing the device'over the surface in a forward and backward movement, the vibrations cause the leveling off of any ridges or depressions on the surface and cause the coarse aggregate to work down from the surface and the fine aggregate and cement to come to the surface. the backward and forward movement, rapidly provides a finished surface.

In the drawings:

Figure 1 is a front elevational view of the device with the cover in transverse section.

Figure 2 is a cross sectional view taken along the lines 22 of Figure 1, looking in the direction of the arrows.

For purposes of illustration, there is shown in the drawings a concrete finishing device made in accordance with the invention. This device comprises an elongated trowel I, upon the upper surface of which is bolted or welded a pair of steel This action, together with bars 2, which are disposed in parallel relation and extend transversely acrossthe screed I. These bars I form. base members upon which are mounted a bridge 3 and .apair of right angle brackets 4. While'a trowel has been shown, it is obvious that other concrete working implements may be used with this device, including a fioator the like. I p

The bridge 31s of inverted U-shape d construction and is provided with laterally extending flanges containing apertures by means or which the brid e is secured to the base members 2 by a bolt and wing nut arrangement 5. One leg of each of the brackets 4 is also apertured and secured to the base member 2 by the same arrangement. The device is provided with an electrical pulsating magnet vibrator 6 which is secured to the bridge 3 by a bolt 1.. This vibrator maybe oi? a typewhich operates on 110 volts and cycles, and preferably is capable of producin 7200 vibrations per minute. The vibrations are transmitted through the bridge .3. to the trowel l.

Preferably. thevibr'ator i'sfofi'set from the bridge. The right angle brackets 4 are arranged to present a pair of vertically extending legs arranged in paralielrelation, and are spacedto receive thelower extremity of a handle 8. The remaining legs of the brackets 4 extend laterally. inopposite directions and are anchored to the base members2in.the manner which has previously been described.

The handle 8 is pivotaliy attached to the brackets 4. by means of apair 'ofscrews 9. One of the brackets 4 is also'provided with a plurality of apertures, the. centers of which are drilled on an are or this pivotal mounting. This arrangement allows the handle 8 to be adiustabiy mounted by the insertion ofjflthepin ii) in a selectedaperture. I r

This independent mounting of. the vibrator. 8 and handle flpermits'vibrati-ons to be transmitted to the trowel without directtransmission ofthe vibrations to the operator through the handle.

For this reason, the device can be conveniently.

operated without interference due to excessive vibration.

The wire I l' is of sufflcient length to connect the vibrator 6 to a suitable source of electric current without interfering withthe operation of the device. Brackets l2 are provided on the handle to hold this wire in place while the tool is in op-. eration. A switch may be provided on the handle to make and break the current.

The handle may be of any suitable length and A sheetmet 1=eover3 1 Ms providedto "protect the' assembly. 'l-his' cover may be detachably mounted in any suitable manner. Preferably it is attached to the base members 2. In the illustrated form; this cover extends over three sides and the top of an area which is occupied by thevib'rator 6; the bridge member 3 and the bracket-SJ upon which the handle is mounted.

It is believed to be obvious frontingsteem tion that a device made in accordance with the present invention canbe readily operated, is durable. and efiicient, and can be, readily trans orted; W'liile'ior purposes of illustration only one'forni of the invention has been disclosed, the invl entio'n" embodies various changes in fthestructur'e' arid; iri af rial oftheillustratediormf 1,. A concrete finishing pence comprising an elongated concrete finishing implement, base members secured to the upper sur'face'of' said imple ment, a mounting provided with a pair of late'ra-lly, extending flanges. joining said base members; an,electricallpulsating, magnet vibrator secured to the'moun'ting', a handle to manipulate the device, a pair of right" angle brackets arranged to present two' vertically extending arms spaced to receive the handle, the remaining armsof the bracketsextending laterally in opposite direction's, means toadj" tably' secure the handle to the vertically extending arms,- means to connect theyibratorfto' as'ourceof electricity, and" means mountedon thesaid base. members to'secure the flanges'of then'iounting' and the laterally extendil-ig ar llfl s (if, the brackets t6 the b'as'e'melnbers.

' aigA-ee erete finishing] device" comprising an elongated, concrete" finish ng" imp ement, a pair o'fst'rips disposed-m parallel relation and secured to the" upper surface" ofytlcie implement to form 3. A concrete finishing device comprising an elongated trowel, a pair of strips disposed in parallel relation and secured to the upper surface of the trowel transversely thereof to form base members, a mounting provided with a pair of laterally extending flanges joining the said base members, an electrical pulsating magnet vibrator secured to the mounting, a pair of right angle br-acketsarranged-to present two spaced vertically--eitefiding arn'i'sdisposed in parallel relation, the remaining arms extending laterally in opposite directions, a handle to operate the device,

said handle being positioned between the ver- "tically 'eir'terid'ing arms, means to adjustably attach the handle to the vertically extending arms,

means carried by the handle to connect the vi- -bia'tiii tii' sour'e of electricity, and bolt means mounted-on each of the said base members to secure respectively one of the flanges of the mounting and the laterally extending arm of one of the brackets: toeac'h o'f the saidb'ase members.

' 4. A eefierete finishing device comprising an elongated trowel, a pairofstripsdisposed inparanerreletiqn ana seeured to the upper surface of the" trowel" transversely thereof to form base members; mounting provided with a pair of laterally extending fiange's'join'ing the said base members, an electrical pulsating magnet vibrator securedto the mounting; said vibrator being'capableofappr'oximately7200 vibrations per miniit'e, a pair of right angle bracket's arranged to present two spaced vertically extendingarms-dis posed parallelfrelation, the remaining arms exteridin'g'laterally irr opp'ositedirections, a handle-"to oper'atethe devi'ce, said handle being p'ositioiie'd" between; the vertically extending arms, mee'ns toadjustablyattach the handle to' the vertically extending arm's, means" carried by the handle wee neet the vibrator to a source of electricity', and bolt means mounted on each of the said "see members'to securerespectively one of iige's of the mounting" and the laterally exarin"of one ofthe brackets, to each of the I i tfbais e m rribeis'g A o WILLIAM J. SPQNSELLER.

1tEFERENGEs CITED The renewing" references are of record inthe file of; this patent:

ITED' S'IATEE3 PATENTS 

